Here's why:
* "Proposition" typically refers to a statement or suggestion that is put forward for consideration.
* "Phrase" is a group of words that function as a unit within a sentence.
It's possible that "proposition phrases" could be used to describe:
* Independent Clauses: These are complete sentences with a subject and verb that can stand alone. They might be considered propositions in the sense that they express a complete thought.
* Phrases that contain propositions: This could involve phrases that include words like "that," "because," or "although," which introduce subordinate clauses expressing a proposition.
Here are some examples:
* Independent Clause: "The sun is shining." (This is a complete thought and could be considered a proposition.)
* Phrase with a proposition: "Because the sun is shining, we're going to the beach." (The phrase "because the sun is shining" expresses a proposition, but it's not a complete sentence on its own.)
To understand the intended meaning of "proposition phrases," you need more context.
If you can provide the source or the specific situation where you encountered this term, I might be able to give you a more accurate answer.